He sure does grow, both as a person and a hero. But my friend, don't force yourself to read it if you dislike it so. Though I wish you'd enjoy it, can't help it if you do not.
My dude, just drop it if thighs aren't your thing. It's Touka's shtick and it'll be present throughout the manga. If it really grinds your gears that much that you'd drop it because of it, just do it. I'm not sure why you need someone to tell if you should drop something or not.